[Frontend] Add CI workflow for frontend lint/test/build

[floxxih]

Create dedicated CI pipeline for frontend lint, tests, and production build validation.

Acceptance Criteria:

• Workflow runs on PRs and pushes
• Caching is configured for dependencies
• Build artifacts/logs are retained

[Favourof]

@Favourof has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

I will love to work on this issue.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Favourof to this issue.

[blessinngluka]

@blessinngluka has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

I would love to work on this

ℹ️ Repo Maintainers: To accept this application, review their application or assign @blessinngluka to this issue.

[archanavdev]

@archanavdev has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hi, I'd love to work on this issue. I'm a full-stack blockchain developer specializing in web apps and Smart Contracts, with experience in Next.js, TypeScript, Tailwind, and blockchain integration's and writing tests. I can handle this confidently.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @archanavdev to this issue.

[drips-wave]

Congratulations, @archanavdev! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @archanavdev: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊